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Bournemouth Borough Council Updating And Screening Assessment 2015

Bureau Veritas Air Quality

October 2015

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Date August 2015 August 2015 October 2015 Submitted to Rachel Elford Rachel Elford Rachel Elford

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Bureau Veritas Bournemouth Borough Council

LAQM USA 2015 1

2015 Updating and Screening Assessment for Bournemouth Borough Council In fulfillment of Part IV of the Environment Act 1995 Local Air Quality Management October 2015


LAQM USA 2015 2

Local Authority Officer

Rachel Elford

Department Pollution Control

Address Town Hall, Bourne Avenue, Bournemouth, BH2 6DY

Telephone 01202451302 e-mail [email protected] Report Reference number


Date October 2015


LAQM USA 2015 3

Executive Summary

This report fulfils the requirements of the Local Air Quality Management process as

set out in Part IV of the Environment Act (1995), the Air Quality Strategy for England,

Scotland, Wales and Northern Ireland 2007 and the relevant Policy and Technical

Guidance documents. The LAQM process places an obligation on all local authorities

to regularly review and assess air quality in their areas, and to determine whether or

not the air quality objectives are likely to be achieved. Where exceedences are

considered likely, the local authority must then declare an Air Quality Management

Area (AQMA) and prepare an Air Quality Action Plan (AQAP) setting out the

measures it intends to put in place in pursuit of the objectives.

This Updating and Screening Assessment fulfils the first part of the sixth round of

review and assessment under the LAQM regime and considers monitoring data from

2014, assessing this against the Air Quality Strategy (AQS) objectives. It also

considers any potential new pollutant emission sources that may have an impact on

local air quality.

Concentrations of NO2 in 2014 were below both the annual mean and 1-hour mean

AQS objective at locations of relevant exposure inside the Wimborne Road AQMA.

Therefore, consideration may be given to revocation of this AQMA.

An exceedence of the annual mean NO2 AQS objective was monitored at one

location outside of this AQMA, at site B41 545 Christchurch Road. However, this is

based on only seven months data and a road layout that has since been amended.

Due to the uncertainty associated with short-term data sets, it is not considered

necessary to proceed to Detailed Assessment of this area at this time. However, as

the monitoring in Christchurch Road was concluded in 2014, the Council will re-

commission NO2 monitoring at this location to establish if an exceedence is still likely

to be present.

An exceedence of the Ozone AQS objective was observed in 2014 in the Borough,

though this pollutant is not part of the LAQM regime.

Recorded concentrations of PM2.5 in 2014 in the Borough continue be below the well

below the target value of 25µg/m3.


LAQM USA 2015 4

Three new emissions sources within the borough were considered, namely an

amended stack at 9 Castle Road, a multi storey car park on Madeira Road West and

the new hotel development at East Overcliff Drive.

Air quality impacts from the developments at 9 Castle Road and on Madeira Road

West were considered, and concluded not to be significant.

Data was not available at time of writing to undertake a screening assessment at the

East Overcliff Drive development, though this will be considered in the next round of

assessment if necessary.

Based on the 2015 USA, the recommended actions are:

▪ Re-commission the monitoring regime on Christchurch Road, possibly with

continuous monitoring, to confirm if an exceedence is still occurring.

▪ Continually assess the progress of the East Overcliff Drive development, and

to screen the development in the next round of assessment if necessary.

▪ Submit 2016 Progress Report

▪ Consider revocation of existing Wimborne Road AQMA


LAQM USA 2015 5

Table of contents 1 Introduction ...................................... ................................................................ 8

1.1 Description of Local Authority Area ................................................................................... 8

1.2 Purpose of Report .............................................................................................................. 8

1.3 Air Quality Objectives ........................................................................................................ 9

1.4 Summary of Previous Review and Assessments ............................................................ 10

2 New Monitoring Data ............................... ...................................................... 13

2.1 Summary of Monitoring Undertaken ................................................................................ 13

2.1.1 Automatic Monitoring Sites .............................................................................................. 13

2.1.2 Non-Automatic Monitoring Sites ...................................................................................... 15

2.2 Comparison of Monitoring Results with Air Quality Objectives ....................................... 18

2.2.1 Nitrogen Dioxide .............................................................................................................. 18

2.2.2 PM10 ................................................................................................................................. 29

2.2.3 Sulphur Dioxide................................................................................................................ 29

2.2.4 Benzene ........................................................................................................................... 29

2.2.5 Other pollutants monitored .............................................................................................. 29

2.2.6 PM2.5 ................................................................................................................................ 29

2.2.7 Ozone .............................................................................................................................. 32

2.2.8 Summary of Compliance with AQS Objectives ............................................................... 32

3 Road Traffic Sources .............................. ....................................................... 34

3.1 Narrow Congested Streets with Residential Properties Close to the Kerb ..................... 34

3.2 Busy Streets Where People May Spend 1-hour or More Close to Traffic ....................... 34

3.3 Roads with a High Flow of Buses and/or HGVs. ............................................................. 34

3.4 Junctions .......................................................................................................................... 34

3.5 New Roads Constructed or Proposed Since the Last Round of Review and

Assessment ................................................................................................................................. 35

3.6 Roads with Significantly Changed Traffic Flows .............................................................. 35

3.7 Bus and Coach Stations .................................................................................................. 36

4 Other Transport Sources ........................... .................................................... 37

4.1 Airports ............................................................................................................................. 37

4.2 Railways (Diesel and Steam Trains) ............................................................................... 37

4.2.1 Stationary Trains .............................................................................................................. 37

4.2.2 Moving Trains .................................................................................................................. 37

4.3 Ports (Shipping) ............................................................................................................... 37

5 Industrial Sources ................................ .......................................................... 38

5.1 Industrial Installations ...................................................................................................... 38

5.1.1 New or Proposed Installations for which an Air Quality Assessment has been

Carried Out ...................................................................................................................................... 38


LAQM USA 2015 6

5.1.2 Existing Installations where Emissions have Increased Substantially or New

Relevant Exposure has been Introduced ........................................................................................ 38

5.1.3 New or Significantly Changed Installations with No Previous Air Quality

Assessment ..................................................................................................................................... 39

5.2 Major Fuel (Petrol) Storage Depots ................................................................................. 39

5.3 Petrol Stations.................................................................................................................. 40

5.4 Poultry Farms................................................................................................................... 40

6 Commercial and Domestic Sources ................... .......................................... 41

6.1 Biomass Combustion – Individual Installations ............................................................... 41

6.2 Biomass Combustion – Combined Impacts ..................................................................... 41

6.3 Domestic Solid-Fuel Burning ........................................................................................... 41

7 Fugitive or Uncontrolled Sources .................. ............................................... 42

8 Conclusions and Proposed Actions .................. ........................................... 43

8.1 Conclusions from New Monitoring Data .......................................................................... 43

8.2 Conclusions from Assessment of Sources ...................................................................... 43

8.3 Proposed Actions ............................................................................................................. 44

9 References ........................................ .............................................................. 45

Appendix A: QA/QC Data ............................ ........................................................... 47

Diffusion Tube Bias Adjustment Factors ......................................................................................... 47

Factor from Local Co-location Studies ............................................................................................ 47

Discussion of Choice of Factor to Use ............................................................................................ 48

PM Monitoring Adjustment .............................................................................................................. 48

Short-term to Long-term Data Adjustment ...................................................................................... 49

QA/QC of Automatic Monitoring ...................................................................................................... 49

QA/QC of Diffusion Tube Monitoring ............................................................................................... 49

Appendix B: Monthly NO 2 Monitoring Data .................................. ........................ 51

Appendix C: Distance Correction ................... ...................................................... 53


LAQM USA 2015 7

List of Tables

Table 1.1 - Air Quality Objectives included in Regulations for the purpose of LAQM in England . 9

Table 2.1 - Details of Automatic Monitoring Sites ........................................................................14

Table 2.2 - Details of Non-Automatic Monitoring Sites ................................................................16

Table 2.3 - Results of Automatic Monitoring of Nitrogen Dioxide: Comparison with Annual Mean

Objective ..................................................................................................................19

Table 2.4 - Results of Automatic Monitoring for Nitrogen Dioxide: Comparison with 1-hour mean

Objective ..................................................................................................................19

Table 2.5 - Results of Nitrogen Dioxide Diffusion Tubes in 2014 ................................................23

Table 2.6 - Results of Nitrogen Dioxide Diffusion Tubes (2010 to 2014) .....................................26

Table 2.7 - Ozone Annual Exceedence Summary .......................................................................32

Table 5.1 - 9 Castle Road Screening Criteria ..............................................................................39

List of Figures

Figure 1.1 - Map of AQMA Boundary ...........................................................................................12

Figure 2.1 - Map of Automatic Monitoring Sites ...........................................................................13

Figure 2.2 - Map of Non-Automatic Monitoring Sites ...................................................................15

Figure 2.3 - Trends in Annual Mean Nitrogen Dioxide Concentrations measures at Automatic

Monitoring Sites .......................................................................................................20

Figure 2.4 - Trends in Annual Mean Nitrogen Dioxide Concentrations measured at Diffusion

Tube Monitoring Sites ..............................................................................................28

Figure 2.5 - Trends in Annual Mean PM2.5 Concentrations .........................................................31

Appendices

Appendix A: QA/QC Data

Appendix B: Monthly NO2 Monitoring Data

Appendix C: Distance Correction


LAQM USA 2015 8

1 Introduction

1.1 Description of Local Authority Area

The Borough of Bournemouth is situated in Dorset on the south coast of England.

The Borough is largely urban as it includes the large coastal town of Bournemouth.

The local economy is dominated by the tourist and the banking and finance sectors.

There is little “heavy” industry in Bournemouth and any potentially polluting industrial

and commercial processes are regulated under the Environmental Permitting

Regulations 2010. The main source of air pollution in the district continues to be

traffic emissions from major roads, whilst other pollution sources (including

commercial, industrial and domestic sources) also make a contribution to background

pollution concentrations.

An Air Quality Management Area (AQMA) was declared in May 2006 at Wimborne

Road, Winton, where exceedences of the annual mean Air Quality Strategy (AQS)

objective for nitrogen dioxide (NO2) were predicted and monitored.

1.2 Purpose of Report

This report fulfils the requirements of the Local Air Quality Management process as

set out in Part IV of the Environment Act (1995), the Air Quality Strategy for England,

Scotland, Wales and Northern Ireland 2007 and the relevant Policy and Technical

Guidance documents. The LAQM process places an obligation on all local authorities

to regularly review and assess air quality in their areas, and to determine whether or

not the air quality objectives are likely to be achieved. Where exceedences are

considered likely, the local authority must then declare an Air Quality Management

Area (AQMA) and prepare an Air Quality Action Plan (AQAP) setting out the

measures it intends to put in place in pursuit of the objectives.

The objective of this Updating and Screening Assessment is to identify any matters

that have changed which may lead to risk of an air quality objective being exceeded.

A checklist approach and screening tools are used to identify significant new sources

or changes and whether there is a need for a Detailed Assessment. The USA report

should provide an update of any outstanding information requested previously in

Review and Assessment reports.


LAQM USA 2015 9

1.3 Air Quality Objectives

The air quality objectives applicable to LAQM in England are set out in the Air

Quality (England) Regulations 2000 (SI 928), The Air Quality (England) (Amendment)

Regulations 2002 (SI 3043), and are shown in Table 1.1. This table shows the

objectives in units of microgrammes per cubic metre µg/m3 (milligrammes per cubic

metre, mg/m3 for carbon monoxide) with the number of exceedences in each year

that are permitted (where applicable).

Table 1.1 - Air Quality Objectives included in Regu lations for the purpose of LAQM in England

Pollutant Air Quality Objective Date to be

achieved by Concentration Measured as

Benzene 16.25 µg/m3 Running annual

mean 31.12.2003

5.00 µg/m3 Running annual mean 31.12.2010

1,3-Butadiene 2.25 µg/m3 Running annual mean 31.12.2003

Carbon monoxide 10.0 mg/m3 Running 8-hour mean

31.12.2003

Lead 0.5 µg/m3 Annual mean 31.12.2004

0.25 µg/m3 Annual mean 31.12.2008

Nitrogen dioxide

200 µg/m3 not to be exceeded more than

18 times a year 1-hour mean 31.12.2005

40 µg/m3 Annual mean 31.12.2005

Particles (PM 10) (gravimetric)

50 µg/m3, not to be exceeded more than


40 µg/m3 Annual mean 31.12.2004

Sulphur dioxide






35 times a year 15-minute mean 31.12.2005


LAQM USA 2015 10

1.4 Summary of Previous Review and Assessments

Bournemouth Borough Council undertook its first round of Review and Assessment

between 1998 and 2002, and concluded that all AQS objectives would be met across

the Borough.

The first phase of the second round of Review and Assessment, the USA, was

completed in 2003. The USA concluded that the Council should complete a Detailed

Assessment for predicted exceedences of the NO2 annual mean objective at

Wimborne Road in Winton.

The Detailed Assessment, completed in 2005, confirmed that the NO2 annual mean

objective would be exceeded at Wimborne Road, Winton. The Detailed Assessment

recommended that further NO2 diffusion tube monitoring be carried out at several

sites in the Wimborne Road area and south of the Talbot Road/Wimborne Road

junction. In addition, the Detailed Assessment concluded that the Council should

consider declaring an AQMA to include the façades of buildings from the junction of

Wimborne Road and Calvin Road, to the junction of Talbot Road and Wimborne

Road. An AQMA was declared in May 2006.

In 2006, the Council completed the first phase of the third round of Review and

Assessment with a new USA. The 2006 USA concluded that no Detailed Assessment

was required for benzene, 1,3-butadiene, carbon monoxide, lead, particles or sulphur

dioxide. However, the Council identified several exceedences of the NO2 annual

mean AQS objective and it was recommended that a Detailed Assessment be carried

out in 11 areas of Bournemouth. It was advised that this assessment be completed

during 2008/2009.

In 2008, the Council completed an Annual Progress Report (APR), before the

planned Detailed Assessment. The APR confirmed that the relevant AQS objectives

for carbon monoxide, benzene, 1,3 butadiene, lead, sulphur dioxide and particles

would be met within Borough. With regard to NO2, it was concluded that the 1-hour

mean AQS objective would be met, however, it was concluded that the NO2 annual

mean AQS objective remained likely to be exceeded at 10 of the 11 sites identified

for Detailed Assessment in Bournemouth Borough Council’s 2006 USA report. As

such, the APR confirmed that a Detailed Assessment should be undertaken for the

NO2 annual mean AQS objective at these sites.


LAQM USA 2015 11

The Detailed Assessment was completed in February 2009 for these 10 sites, and

concluded that exceedence of the NO2 annual mean AQS objective at nearby

properties was unlikely. Therefore, there was no need to declare any new AQMAs in

Bournemouth.

In November 2009, the Council completed a Further Assessment for the Wimborne

Road AQMA. The purpose of the assessment was to update the 2005 Detailed

Assessment to identify whether or not the current extent of the AQMA in Winton was

appropriate and to inform the decision to extend or maintain the AQMA, or look to

revoke its status. The assessment concluded that the AQMA should remain and

recommended that further NO2 diffusion tube monitoring in the area was undertaken.

The 2009 USA and 2010 APR were produced as one combined report. This report

concluded that the AQS objectives for all pollutants would be met within

Bournemouth Borough. Some additional monitoring requirements were identified

along the B3063 through the screening of traffic sources. Therefore there was no

need to proceed to Detailed Assessment.

Both the 2011 APR and 2012 USA1 concluded the air quality objectives at all areas

outside of the AQMA would be met. Analysis was carried out for the NO2 diffusion

tubes within the AQMA for 2011 and the previous three years to determine likely

pollutant concentrations at the building façades of relevant locations. The findings

indicated that levels of all pollutants in the Borough both inside and outside of the

AQMA were below the air quality objective levels at all relevant locations. The

pollutant concentrations in the AQMA were to be monitored closely in future years to

ensure on-going compliance and revocation of the AQMA would be considered. It

was recommended new diffusion tubes were added at the first floor façade in the

AQMA.

The results from both monitoring and assessment of sources in 2012, reported in the

2013 APR2, indicated all air quality objectives in the Borough continued to be met. As

monitoring indicated that NO2 concentrations at façades representative of relevant

exposure may have been below the objective levels for several consecutive years, it

was recommended that the Council considered revocation of the AQMA.

1 Bournemouth Borough Council (2012) Updating and Screening Assessment. 2 Bournemouth Borough Council (2013) Annual Progress Report.


LAQM USA 2015 12

The 2014 APR3 confirmed there were no exceedences of the AQS objectives within

the Borough outside of the Winton Air Quality Management Area (AQMA) in 2013.

The NO2 diffusion tubes within the AQMA indicated concentrations at the building

façades of relevant exposure locations also complied with the AQS objectives.

Therefore the recommendation to consider the revocation of the AQMA was

reiterated.

Figure 1.1 - Map of AQMA Boundary

3 Bournemouth Borough Council (2014) Annual Progress Report.


LAQM USA 2015 13

2 New Monitoring Data

2.1 Summary of Monitoring Undertaken

2.1.1 Automatic Monitoring Sites

There is currently automatic monitoring of NO2, particulates (PM2.5) and ozone (O3)

undertaken at one location in the area. This is the Bournemouth background

monitoring site in the Defra Automatic Urban and Rural Network (AURN). The

monitoring station is located within the grounds of Porchester School. The nearest

main road is the A338 Wessex Way approximately 770m from the site. The nearest

residential road, Shepherds Way, is 48m from the site.

Further details of this monitoring station are provided in Table 2.1 and Figure 2.1.

Figure 2.1 - Map of Automatic Monitoring Sites


LAQM USA 2015 14

Table 2.1 - Details of Automatic Monitoring Sites

Site Name Site Type X OS Grid Ref

Y OS Grid Ref

Pollutants Monitored

In AQMA?

Monitoring Technique

Relevant Exposure? (Y/N with

distance (m) to relevant exposure)

Distance to kerb of nearest

road (N/A if not applicable)

Does this location

represent worst-case exposure?

Bournemouth AURN

Urban Background

412321 093345 NOx, PM2.5, O3

N Chemiluminesence, Partisol 2025

Y (general background)

48 N


LAQM USA 2015 15

2.1.2 Non-Automatic Monitoring Sites

The Council undertook monitoring of NO2 using passive diffusion tubes at 29

locations in 2014, of these, two sites have diffusion tubes deployed in triplicate. BB15

is a triplicate site co-located with the Bournemouth AURN site, and BK20 is a

triplicate site located within the Winton AQMA.

Four new sites were added in December 2013 by the Council’s Planning and

Transport section to monitor the impact of a highway improvement scheme in the

Boscombe area. The four new sites are located at:

� B40 14 Palmerston Road (Arcade)

� B41 545 Christchurch Road

� B42 506 Christchurch road

� B43 3 St Johns Rd (church)

The details of all the non-automatic monitoring sites are given in Figure 2.2.

Figure 2.2 - Map of Non-Automatic Monitoring Sites


LAQM USA 2015 16

Table 2.2 - Details of Non-Automatic Monitoring Sit es

Site Name Site Type X OS

Grid Ref Y OS

Grid Ref Pollutants Monitored

In AQMA?

Is monitoring collocated

with a Continuous

Analyser (Y/N)

Relevant Exposure?

(Y/N with distance (m) to relevant exposure)

Distance to kerb of

nearest road (N/A if not applicable)

Does this location


BK04 Christchurch Road (Pokesdown)

Roadside 412386 92337 NO2 N N Y – 1.3 1.2 Y

BB11 Kings Park Drive Roadside 412486 92712 NO2 N N Y – 3.5 1 Y BK13 Wimborne Road

(Kinson) Roadside 407160 96559 NO2 N N Y – 6 2 Y

BK14 Wallisdown Road Kerbside 406530 94069 NO2 N N Y – 7 0.4 Y BB15 AQMU

Portchester Sch (Harewood Ave)

Urban Background 412319 93340 NO2 N

Triplicate & co-located N - 48 N/A N

BK16 Boundary Road Roadside 408110 94630 NO2 N N Y – 13 2.6 Y BK17 Castle Lane West

(Cooper Dean) Roadside 412175 94308 NO2 N N Y- 10 3.1 Y

BK18 Castle Lane East (Tesco's)

Roadside 412977 93821 NO2 N N Y - 31 4 Y

BK20 Wimborne Road (Winton)

Roadside 408640 93695 NO2 Y Triplicate Y – 3.4 1.1 Y

BK23 Cambridge Road Kerbside 407913 91369 NO2 N N Y - 31 0.5 Y BK24 Talbot Avenue

(Boundary Road Roundabout)

Kerbside 407772 93616 NO2 N N Y- 26 0 Y

BK25 Kinson Road (Columbia Road

Junction) Roadside 406775 94758 NO2 N N Y- 5 1 Y

BK26 St Pauls Road (Roundabout)

Kerbside 409533 91884 NO2 N N Y - 16 0.6 Y

BK28 Castlepoint (Castle Lane West)

Roadside 411211 94652 NO2 N N Y – 8.5 9.5 N


LAQM USA 2015 17

Site Name Site Type X OS

Grid Ref Y OS

Grid Ref Pollutants Monitored

In AQMA?

Is monitoring collocated

with a Continuous

Analyser (Y/N)

Relevant Exposure?

(Y/N with distance (m) to relevant exposure)

Distance to kerb of

nearest road (N/A if not applicable)

Does this location


BK29 Castlepoint West (Castle Lane West)

Roadside 410803 94627 NO2 N N Y - 20 2 Y

BK30 Yeomans Road Roadside 410977 94716 NO2 N N Y - 14 3 Y BK31 Castlepoint East

(Castle Lane West) Roadside 411432 94600 NO2 N N Y - 11 2 Y

BK32 Iford Bridge Roundabout

(Christchurch) Roadside 413556 93440 NO2 N N Y – 8.3 2 Y

BK33 Alma Road Roadside 409146 93228 NO2 N N Y – 5.6 1 Y BK34 Bath Road Roadside 409286 91190 NO2 N N Y – 12.4 1.5 Y

BK35 299 Wimborne Road Roadside 408588 93329 NO2 Y N Y – 2.36 1 Y

BK36 Wimborne Road Junction Kerbside 408606 93374 NO2 Y N Y – 3.95 0 Y

BK37 Cardigan Road Kerbside 408649 93542 NO2 N N Y- 2.7 0 Y BK38 Kemp Road Kerbside 408631 93744 NO2 N N Y – 2.6 0 Y

BK39 Wimborne Road Lib Club Kerbside 408691 93979 NO2 Y N Y – 7.2 0 Y

B40 14 Palmerston Road (Arcade)

Kerbside 411301 91897 NO2 N N Y – 2.0 0.5 N

B41 545 Christchurch Road

Kerbside 411262 91824 NO2 N N Y – 2.0 1 Y

B42 506 Christchurch Road

Kerbside 411168 91792 NO2 N N Y – 2.0 1 Y

B43 3 St Johns Rd (church)

Kerbside 411087 91705 NO2 N N Y – 1.0 1 N


LAQM USA 2015 18

2.2 Comparison of Monitoring Results with Air Quali ty Objectives

2.2.1 Nitrogen Dioxide

There are two Air Quality Objectives for NO2, namely:

� the annual mean of 40µg/m3, and

� the 1-hour mean of 200µg/m3 not to be exceeded more than 18 times a

year.

Automatic Monitoring Data

During 2014, continuous monitoring was carried out at one location, the background

AURN site in Bournemouth.

The monitoring data is presented in Table 2.3, Table 2.4 and Figure 2.3.


LAQM USA 2015 19

Table 2.3 - Results of Automatic Monitoring of Nitr ogen Dioxide: Comparison with Annual Mean Objective

Site ID Site Type Within

AQMA?

Valid Data Capture for

period of monitoring % a

Valid Data Capture 2014

% b

Annual Mean Concentration µµµµg/m3

2010 2011 2012 2013 2014

B1 Urban

Background N 85.2 85.2 17.8 15.4 15.5 14.5 13.1 a i.e. data capture for the monitoring period, in cases where monitoring was only carried out for part of the year. b i.e. data capture for the full calendar year

Table 2.4 - Results of Automatic Monitoring for Nit rogen Dioxide: Comparison with 1-hour mean Objectiv e

Site ID Site Type Within

AQMA?

Valid Data Capture for

period of monitoring % a

Valid Data Capture 2014

% b

Number of Exceedences of Hourly Mean (200 µµµµg/m 3)

2010 2011 2012 2013 2014

B1 Urban Background N 85.2 85.2 0 0 0 0 0

a i.e. data capture for the monitoring period, in cases where monitoring was only carried out for part of the year. b i.e. data capture for the full calendar year (e.g. if monitoring was carried out for six months the maximum data capture for the full calendar year would be 50%). Results in 2014 again showed compliance with the 1-hour mean objective.


LAQM USA 2015 20

Figure 2.3 - Trends in Annual Mean Nitrogen Dioxide Concentrations measures at Automatic Monitoring Si tes

A consistent downward trend in annual mean NO2 concentrations has been monitored since 2010. The reduction between 2010 and

2014 is 4.7 µg/m3. The reduction between 2013 and 2014 is 1.4 µg/m3.


LAQM USA 2015 21

Diffusion Tube Monitoring Data

Data capture for the diffusion tubes monitoring locations was good (above 75%) in

2014 for all sites, with the exception of B41, where there was only seven months data

capture (58%). Short to long term average adjustment (annualisation) was therefore

carried out for this site. Full details of this can be found in Appendix A.

The diffusion tube results for 2014 have been adjusted using a local bias adjustment

factor of 0.84, further details of which can be found in Appendix A.

In order to assess the NO2 concentrations within the Winton AQMA at the façades of

properties representative of relevant exposure, the fall-off with distance calculator4

was applied.

The calculator has been used for the results within the AQMA over 40µg/m3 in 2014

to assess concentrations at locations of relevant exposure. This applied to one site,

BK36 Wimborne Road Junction, where the predicted result at the façade is 28.2

µg/m3.

Having put the results from within the AQMA through the fall-off with distance

calculator, site BK36 did not show an exceedence the AQS objective for annual

mean NO2. Full details of this correction are detailed in Appendix C.

As the concentrations of NO2 in the Winton AQMA at relevant locations have been

below the objective for seven years the Council are considering revocation of the

AQMA.

During 2014, there were three diffusion tube locations where monitored

concentrations were above the 40 µg/m3 AQS objective, outside the current AQMA:

▪ BK34 Bath Road;

▪ B41 545 Christchurch Road; and

▪ B42 506 Christchurch Road.

The distance correction has also been applied to the above, with the following

results:

▪ BK34 Bath Road - predicted result at façade is 30.1 µg/m3;

4 http://laqm.defra.gov.uk/tools-monitoring-data/no2-falloff.html


LAQM USA 2015 22

▪ B41 545 Christchurch Road - predicted result at façade is 48.3 µg/m3; and

▪ B42 506 Christchurch Road - predicted result at façade is 35.4 µg/m3.

As demonstrated, NO2 concentrations are below the annual mean AQS objective at

all locations of relevant exposure after distance correction, with the exception of B41

at 545 Christchurch Road, where there was an exceedence in 2014. However, this

concentration may be due to the uncertainty associated with annualisation and was

in place during a period of temporary road-works. This location is outside of the

currently declared AQMA.


LAQM USA 2015 23

Table 2.5 - Results of Nitrogen Dioxide Diffusion T ubes in 2014

Site ID Location Site Type

Within AQMA?

Triplicate or

Collocated Tube

Data Capture

2014 (# of

Months )

Data with less than 9 months has

been annualised

(Y/N)

Confirm if data has

been distance corrected

(Y/N)

Annual mean concentration

(Bias Adjustment factor = 0.84)

2014 (µµµµg/m 3)

BK04 Christchurch

Road (Pokesdown)

Roadside N N 12 N/a N 33.8

BB11 Kings Park

Drive Roadside N N 12 N/a N 17.0

BK13 Wimborne Road (Kinson)


BK14 Wallisdown

Road Kerbside N N 9 N/a N 37.7

BB15

AQMU Portchester Sch

(Harewood Ave)

Urban Background N

Triplicate & co-located 12 N/a N 14.1

BK16 Boundary Road Roadside N N 12 N/a N 26.9

BK17 Castle Lane

West (Cooper Dean)


BK18 Castle Lane

East (Tesco's) Roadside N N 12 N/a N 33.6

BK20 Wimborne Road (Winton)

Roadside Y Triplicate 12 N/a N 35.7

BK23 Cambridge Road

Kerbside N N 10 N/a N 38.5


LAQM USA 2015 24


Within AQMA?

Triplicate or

Collocated Tube

Data Capture

2014 (# of

Months )


been annualised

(Y/N)

Confirm if data has


(Y/N)



2014 (µµµµg/m 3)

BK24

Talbot Avenue (Boundary

Road Roundabout)


BK25 Kinson Road

(Columbia Road Junction)


BK26 St Pauls Road (Roundabout) Kerbside N N 12 N/a N 39.4

BK28 Castlepoint

(Castle Lane West)


BK29 Castlepoint

West (Castle Lane West)


BK30 Yeomans Road Roadside N N 11 N/a N 29.6

BK31 Castlepoint East (Castle Lane West)


BK32 Iford Bridge Roundabout

(Christchurch) Roadside N N 12 N/a N 31.8

BK33 Alma Road Roadside N N 12 N/a N 28.9 BK34 Bath Road Roadside N N 12 N/a N 41.6

BK35 299 Wimborne Road

Roadside Y N 12 N/a N 37.9

BK36 Wimborne Road Junction

Kerbside Y N 11 N/a N 40.1


LAQM USA 2015 25


Within AQMA?

Triplicate or

Collocated Tube

Data Capture

2014 (# of

Months )


been annualised

(Y/N)

Confirm if data has


(Y/N)



2014 (µµµµg/m 3) BK37 Cardigan Road Kerbside N N 12 N/a N 25.8 BK38 Kemp Road Kerbside N N 12 N/a N 24.5

BK39 Wimborne

Road Lib Club Kerbside Y N 12 N/a N 31.5

B40 14 Palmerston Road (Arcade)


B41 545

Christchurch Road

Kerbside N N 7 Y N 58.2

B42 506

Christchurch Road


B43 3 St Johns Rd

(church) Kerbside N N 12 N/a N 28.1

In Bold – Exceedences of the Annual mean NO2 AQS objective


LAQM USA 2015 26

Table 2.6 - Results of Nitrogen Dioxide Diffusion T ubes (2010 to 2014)

Site ID Site Type

Within AQMA?

Annual mean concentration (adjusted for bias) µµµµg/m3 2010

(Bias Adjustment Factor = 0.88)

2011 (Bias Adjustment

Factor = 0.90)


Factor = 0.90)


Factor = 0.86)


Factor = 0.84) BK04 Roadside N 35.9 33.9 33.5 34.3 33.8 BB11 Roadside N 17.1 16.2 17.2 16.9 17.0 BK13 Roadside N 36 36 35.6 31.9 31.5 BK14 Kerbside N 39.3 33.8 39 34.5 37.7

BB15 Urban Background N 16.2 14.6 15.6 14.6 14.1

BK16 Roadside N 28.2 26.4 28.1 26.9 26.9 BK17 Roadside N 33.4 36.3 35.8 31.7 34.5 BK18 Roadside N 35.7 33.5 35 31.8 33.6 BK20 Roadside Y 46.2 45.7 44.5 38.5 35.7 BK23 Kerbside N 42.9 40.3 42.6 40.5 38.5 BK24 Kerbside N 39.7 27.1 30.2 28 29.0 BK25 Roadside N 42.6 41.5 39.5 36.8 35.9 BK26 Kerbside N 44.1 41.9 43.7 41.6 39.4 BK28 Roadside N 30.3 31.5 32.3 28.5 30.3 BK29 Roadside N 30.8 29.6 29.6 27.1 28.6 BK30 Roadside N 31.1 30.8 30.7 29.6 29.6 BK31 Roadside N 37.1 41.3 40.3 37.4 37.8 BK32 Roadside N 36.1 35.4 35.5 33 31.8 BK33 Roadside N 34.9 30.7 33.5 33.1 28.9 BK34 Roadside N 44.1 35.5 43 43.5 41.6 BK35 Roadside Y 42.2 39.8 41 39.8 37.9 BK36 Kerbside Y 43.5 41.5 45 42.7 40.1 BK37 Kerbside N 29.9 28.2 29.3 28.4 25.8 BK38 Kerbside N 28.8 26.8 26.9 27.6 24.5 BK39 Kerbside Y 35.9 35.5 35.6 34.4 31.5 B40 Kerbside N - - - - 34.6 B41* Kerbside N - - - - 58.2


LAQM USA 2015 27

Site ID Site Type

Within AQMA?

Annual mean concentration (adjusted for bias) µµµµg/m3 2010

(Bias Adjustment Factor = 0.88)


Factor = 0.90)


Factor = 0.90)


Factor = 0.86)


Factor = 0.84) B42 Kerbside N - - - - 41.6 B43 Kerbside N - - - - 28.1

* Annualised

In Bold – Exceedences of the Annual mean AQS objective


LAQM USA 2015 28

Figure 2.4 - Trends in Annual Mean Nitrogen Dioxide Concentrations measured at Diffusion Tube Monitori ng Sites

Generally speaking, NO2 concentrations have been on a downward trajectory since 2010, with the exception of some annual

fluctuations. When compared to 2013, 2014 concentrations were higher at ten locations and lower at nineteen, indicative of a largely

downward trend. Large increases from 2013 were monitored in 2014 at sites BK14, BK17 and BK18. Potential new exceedences

have been introduced in Christchurch Road.


LAQM USA 2015 29

2.2.2 PM10

No monitoring of PM10 takes place in the Borough. All previous LAQM reports have

identified that there is not likely to be any exceedences of the PM10 AQS objectives.

2.2.3 Sulphur Dioxide

No monitoring of Sulphur Dioxide takes place in the Borough. All previous LAQM

reports have identified that there is not likely to be any exceedences of the sulphur

dioxide AQS objectives.

2.2.4 Benzene

No monitoring of benzene takes place in the Borough. All previous LAQM reports

have identified that there is not likely to be any exceedences of the Benzene AQS

objectives.

2.2.5 Other pollutants monitored

Monitoring of PM2.5 and Ozone was undertaken in the Borough in 2014.

2.2.6 PM2.5

PM2.5 is monitored at the AURN background site. PM2.5 objectives have been set out

in the UK Air Quality Regulations. Although there is no requirement for local

authorities to review and assess PM2.5 against these objectives as part of the LAQM

regime, results have been reported as recommended by Technical Guidance

LAQM.TG(09)5.

The target for PM2.5 is an annual mean of 25µg/m3 by 2020. PM2.5 objectives have

been set out in the UK Air Quality Regulations. There is no obligation upon local

authorities to carry out monitoring of PM2.5. The UK’s monitoring requirements with

respect to PM2.5 are fulfilled by data from national monitoring networks.

The PM2.5 results indicate that levels are well below the target value of 25µg/m3 in

2014.

5 Local Air Quality Management; Technical Guidance LAQM.TG(09), Available at: http://laqm.defra.gov.uk/technical-guidance/


LAQM USA 2015 30

Table 2.7 - Results of Automatic Monitoring of PM 2.5: Comparison with Annual Mean Objective

Site ID Site Type

Within AQMA?

Valid Data Capture for monitoring Period % a

Valid Data

Capture 2014 %b

Confirm Gravimetric Equivalent (Y or NA)

Annual Mean Concentration µµµµg/m3

2010 2011 2012 2013 2014

B1 Urban

Background N 84.9 84.9 Y 9.1 8.9 9.2 9.2 8.2 a i.e. data capture for the monitoring period, in cases where monitoring was only carried out for part of the year. b i.e. data capture for the full calendar year (e.g. if monitoring was carried out for six months the maximum data capture for the full calendar year would be 50%).


LAQM USA 2015 31

Figure 2.5 - Trends in Annual Mean PM 2.5 Concentrations

Concentrations since 2010 have remained relatively stable and have consistently been below the annual mean objective as set out in

the UK Air Quality Regulations. A reduction of 1 µg/m3 from 2013 concentrations was monitored in 2014, though this is with a reduced

data capture of 84.9%.


LAQM USA 2015 32

2.2.7 Ozone

Continuous monitoring of O3 is undertaken at the Bournemouth AURN Background

monitoring site. O3 is a transboundary pollutant; the sources of O3 are frequently

spatially distant from the measured site of the concentrations. This pollutant is not a

prescribed air quality objective for LAQM purposes; however, it has been reported as

recommended by Technical Guidance LAQM.TG(09).

As can be seen in Table 2.7 below, the AQS objective for O3, of 10 8-hour running

mean exceedences of 100 µg/m3 per year continues to be exceeded. The O3

concentrations in the area have been consistently exceeding the objectives.

Table 2.7 - Ozone Annual Exceedence Summary

Location Within AQMA

? Description

% Data capture

2014

Number of Exceedences

in 2012


in 2013


in 2014

Bournemouth (AURN)

No

Maximum 8-hour running mean > 100

µg/m3

85.7 150 125 63

In bold , exceedence of the ozone AQS objective: 8 hour mean of 100µg/m3 - 10 exceedences allowed per year.

2.2.8 Summary of Compliance with AQS Objectives

The Council has assessed the monitoring data for 2014 and concluded that for NO2,

both the annual mean and 1-hour mean objectives are met at all locations of relevant

exposure, including within the current AQMA, with the exception of B41 at 545

Christchurch Road. The annual mean NO2 concentration at B41 was observed to be

above the AQS objective even after the fall off with distance calculator was used to

calculate the concentration at the nearest receptor location.

However, this exceedence was based on seven months’ data, which was annualised.

Therefore there is uncertainty associated with the annual concentration. In addition,

the tube was deployed during a period where temporary road works were in place,

which have since concluded. For these reasons, it is not considered necessary to

proceed to Detailed Assessment at this point.

The Council will however re-implement NO2 monitoring on Christchurch Road, to

confirm whether the exceedence is repeated over a 12-month period and given the


LAQM USA 2015 33

updated road layout. If the exceedence is repeated, the Council will then consider

Detailed Assessment of the area.

Concentrations of NO2 continue to be below the AQS objective at locations of

relevant exposure within the Wimborne Road AQMA, so consideration may be given

to revocation of this particular AQMA.

An exceedence of the Ozone AQS objective has been observed in 2014 in the

Borough, though this pollutant is not part of the LAQM regime.



Bournemouth Borough Council has measured concentrations of NO2 above the annual mean objective at relevant locations outside of the AQMA on Christchurch Road. However, it is not considered necessary to proceed to Detailed Assessment at this time given the uncertainty associated with the short-term data set and the change to the road layout


LAQM USA 2015 34

3 Road Traffic Sources This section addresses any changes to the road traffic network in the Local Authority

area that may affect air quality. Locations are considered which:

▪ have not been assessed during the earlier rounds,

▪ have experienced a significant change in traffic flows;

▪ have a new development, or

▪ have new exposure that has not been assessed previously.

3.1 Narrow Congested Streets with Residential Properties Close to the Kerb

Bournemouth Borough Council confirms that there are no new/newly identified congested streets with a flow above 5,000 vehicles per day and residential properties close to the kerb, that have not been adequately considered in previous rounds of Review and Assessment.

3.2 Busy Streets Where People May Spend 1-hour or More Close to Traffic

Bournemouth Borough Council confirms that there are no new/newly identified busy streets where people may spend 1 hour or more close to traffic.

3.3 Roads with a High Flow of Buses and/or HGVs.

Bournemouth Borough Council confirms that there are no new/newly identified roads with high flows of buses/HDVs.

3.4 Junctions

Bournemouth Borough Council confirms that there are no new/newly identified busy junctions/busy roads.


LAQM USA 2015 35

3.5 New Roads Constructed or Proposed Since the Las t Round of Review and Assessment

Bournemouth Borough Council confirms that there are no new/proposed roads.

3.6 Roads with Significantly Changed Traffic Flows

In accordance with the procedure set out in Section A.6 of Box 5.3 in TG(09), the

Council has identified two developments with the potential to significantly change

traffic flows, and thus air quality, namely;

▪ Application No: 7-2012-12021-B, Location: Public Car Park, Madeira Road

West, Proposal: Erection of 6 storey 400 space multi-storey car park and

erection of three 3/4/5 storey student accommodation (378 units); and

▪ Application No: 7-2014-5442-T, Location: 75-87 Grove Road and 33-35 East

Overcliff Drive. Proposal: Demolition of existing buildings and the erection of a

7 storey 90 bedroom hotel (Block A) and the erection of 2 assisted living

blocks, a 9 storey building comprising 69 units (Block B) and the erection of a

7 storey building comprising 53 units (Block C), associated facilities including

associated ancillary facilities, formation of new vehicular access, basement

parking, bin, buggy and cycle stores.

These have been assessed accordingly.

Public Car Park, Madeira Road West – The development was granted permission

in 2012. A detailed air quality assessment6 was conducted by Air Quality Consultants

as part of the planning process, which concludes the impacts of the scheme would

be negligible at all receptor locations, with all AQS objectives being met with the

scheme in place.

The development has since been implemented.

Grove Road / East Overcliff Drive - This development was granted planning

permission in early 2015, though construction has not yet commenced on the project.

At the time of reporting, there was no data available to screen the development’s

impacts, though it is recommended that this is done in the next round of review and

assessment. The Council is also aware that the developer is currently undertaking 6 Air Quality Consultants (2012) Madeira Road West, Bournemouth Air Quality Assessment


LAQM USA 2015 36

the Air Quality assessment associated with the project, which will be reviewed

accordingly on completion.

Bournemouth Borough Council has assessed new/newly identified roads with significantly changed traffic flows, and concluded that it will not be necessary to proceed to a Detailed Assessment.

3.7 Bus and Coach Stations

Bournemouth Borough Council confirms that there are no relevant bus stations in the Local Authority area.


LAQM USA 2015 37

4 Other Transport Sources

4.1 Airports

Bournemouth Borough Council confirms that there are no relevant airports in the Local Authority area.

4.2 Railways (Diesel and Steam Trains)

Following the procedure as set out in Section B.2 of Box 5.4 of TG(09), the

assessment for stationary trains has considered SO2, while the assessment for

moving diesel trains has considered NO2.

4.2.1 Stationary Trains

Bournemouth Borough Council confirms that there are no locations where diesel or steam trains are regularly stationary for periods of 15 minutes or more, with potential for relevant exposure within 15m.

4.2.2 Moving Trains

Bournemouth Borough Council confirms that there are no locations with a large number of movements of diesel locomotives, and potential long-term relevant exposure within 30m.

4.3 Ports (Shipping)

Bournemouth Borough Council confirms that there are no ports or shipping that meet the specified criteria within the Local Authority area.


LAQM USA 2015 38

5 Industrial Sources

5.1 Industrial Installations

The following has been considered in accordance with the procedure set out in

Section C.1 of Box 5.5 in TG(09).

5.1.1 New or Proposed Installations for which an Ai r Quality Assessment has been Carried Out

Bournemouth Borough Council confirms that there are no new or proposed industrial installations for which planning approval has been granted within its area or nearby in a neighbouring authority.

5.1.2 Existing Installations where Emissions have I ncreased Substantially or New Relevant Exposure has been Introduced

Within the 2014 APR, the Council identified one existing installation with altered

emissions which has the potential to impact on local air quality. This is the alteration

of a gas fired chimney (which was previously oil fired) at 9 Castle Road.

A D1 HMIP technical guidance note7 was produced on behalf of Thelkane Industrial

Chimneys Ltd in order to calculate the necessary stack height for the installation, with

the resultant stack height being 13.75m.

The NO2 emissions (PM10 was unavailable) from this height were screened using

ADMS-Screen8 using the parameters listed in Table 5.1.

7 Thelkane Industrial Chimneys Ltd (2012) HMIP – Technical Guidance Note (Dispersion) D1 8 CERC Ltd (2004) ADMS-Screen 3


LAQM USA 2015 39

Table 5.1 - 9 Castle Road Screening Criteria

Parameter Value Units Co-ordinates of stack 408888, 094263 X,Y

Distance of closest sensitive receptors from the stack 30 m

Co-ordinates of closest sensitive receptor 408858, 094263 X,Y

Building length, widths and height 76 (l) 26.8 (w) 10.75 (z) m

Height of stack(s) 13.75 m

Stack exit diameter(s) 0.46 m

Exit temperature(s) 220 oC

Exit velocities 13.57 m/s

Emission rate(s) of NO2 0.002 g/s

Emission rate(s) of PM10 n/a g/s

Based on these inputs, the maximum process contribution to the annual mean NO2

concentration at the nearest receptor, 30m west of the stack at 48 Denmark Road,

was 0.001 µg/m³. When considered in combination with a background concentration

of 16.1 µg/m³, this is still well below the annual mean AQS objective. The maximum

process contribution at any nearby receptor (approximately 40m north-east) was 0.03

µg/m³ at 56 Castle Road, which again is well below the objective. Therefore it will not

be necessary to proceed to Detailed Assessment of this installation.

Bournemouth Borough Council has reviewed industrial installations with altered emissions or new relevant exposure in their vicinity within its area or nearby in a neighbouring authority and confirms there is no need to proceed to Detailed Assessment.

5.1.3 New or Significantly Changed Installations wi th No Previous Air Quality Assessment

Bournemouth Borough Council confirms that there are no new or proposed industrial installations for which planning approval has been granted within its area or nearby in a neighbouring authority.

5.2 Major Fuel (Petrol) Storage Depots


Section C.2 of Box 5.5 in TG(09), considering Benzene for assessment.


LAQM USA 2015 40

There are no major fuel (petrol) storage depots within the Local Authority area.

5.3 Petrol Stations

Bournemouth Borough Council confirms that there are no petrol stations meeting the specified criteria.

5.4 Poultry Farms

Bournemouth Borough Council confirms that there are no poultry farms meeting the specified criteria.


LAQM USA 2015 41

6 Commercial and Domestic Sources

6.1 Biomass Combustion – Individual Installations


Section D.1a of Chapter 5 in TG(09).

Bournemouth Borough Council confirms that there are no biomass combustion plant in the Local Authority area.

6.2 Biomass Combustion – Combined Impacts

Bournemouth Borough Council confirms that there are no biomass combustion plant in the Local Authority area.

6.3 Domestic Solid-Fuel Burning

Bournemouth Borough Council confirms that there are no areas of significant domestic fuel use in the Local Authority area.


LAQM USA 2015 42

7 Fugitive or Uncontrolled Sources Bournemouth Borough Council confirms that there are no potential sources of fugitive particulate matter emissions in the Local Authority area.


LAQM USA 2015 43

8 Conclusions and Proposed Actions

8.1 Conclusions from New Monitoring Data

Monitored concentrations of NO2 in 2014 were below both the annual mean and 1-

hour mean AQS objective at locations of relevant exposure inside the Wimborne

Road AQMA. Therefore, consideration may be given to revocation of this AQMA.

An exceedence of the annual mean NO2 AQS objective was monitored at one

location outside of this AQMA, at site B41 at 545 Christchurch Road.

The annual mean NO2 concentration at B41 was observed to be above the AQS

objective even after the fall off with distance calculator was used to calculate the

concentration at the nearest receptor location However, this is based on only seven

months data and a road layout that has since been amended. Due to the uncertainty

associated with short-term data sets, it is not considered necessary to proceed to

Detailed Assessment of this area at this time. However, as the monitoring in

Christchurch Road was concluded in 2014, the Council will re-commission the NO2

monitoring to confirm if an exceedence is still occurring.

An exceedence of the Ozone AQS objective has been observed in 2014 in the

Borough, though this pollutant is not part of the LAQM regime.



8.2 Conclusions from Assessment of Sources

Assessment of three new emissions sources within the borough was considered,

namely an amended stack at 9 Castle Road, a multi storey car park on Madeira Road

West and the new hotel development at East Overcliff Drive.

Air quality impacts from the developments at 9 Castle Road and on Madeira Road

West were considered, and concluded not to be significant.

Data was not available at time of writing to undertake a screening assessment at the

East Overcliff Drive development, though this will be considered in the next round of

assessment if necessary.


LAQM USA 2015 44

8.3 Proposed Actions

Based on the 2015 USA, the recommended actions are:

▪ Re-commission the monitoring regime on Christchurch Road, possibly with

continuous monitoring, to confirm if an exceedence is still occurring.

▪ Continually assess the progress of the East Overcliff Drive development, and

to screen the development in the next round of assessment if necessary.

▪ Submit 2016 Progress Report

▪ Consider revocation of existing Wimborne Road AQMA


LAQM USA 2015 45

9 References ▪ Bournemouth Borough Council (2012) Updating and Screening Assessment.

▪ Bournemouth Borough Council (2013) Annual Progress Report.

▪ Bournemouth Borough Council (2014) Annual Progress Report.

▪ http://laqm.defra.gov.uk/tools-monitoring-data/no2-falloff.html

▪ Local Air Quality Management; Technical Guidance LAQM.TG(09), Available

at: http://laqm.defra.gov.uk/technical-guidance/

▪ Air Quality Consultants (2012) Madeira Road West, Bournemouth Air Quality

Assessment

▪ Thelkane Industrial Chimneys Ltd (2012) HMIP – Technical Guidance Note

(Dispersion) D1

▪ CERC Ltd (2004) ADMS-Screen 3

▪ http://laqm.defra.gov.uk/documents/LAQM-WASP-Rounds-121--124-and-AIR-

PT-Rounds-1-3-4-6 (April-2013--February-2015)-NO2-report.pdf


LAQM USA 2015 46

Appendices


Appendix B: Monthly NO2 Monitoring Data

Appendix C: Distance Correction


LAQM USA 2015 47


Diffusion Tube Bias Adjustment Factors

The diffusion tubes in 2014 were supplied and analysed by South Yorkshire Air

Quality Samplers utilising the 50% triethanolamine (TEA) in acetone preparation

method. The national bias adjustment factor for 2014 for this preparation method

was 0.67. This was based on one study at Marylebone Road.

Factor from Local Co-location Studies

A local bias factor of 0.84 for 2014 has been calculated using a co-location study at

the Bournemouth AURN station. Exposure periods for the NO2 diffusion tubes

matched the suggested calendar and data capture was excellent, as only one

month’s worth of exposure data was missing from a possible 36 (12 for each of the

triplicate tubes). Data capture at Bournemouth AURN station was affected by a

power outage in 2014, which resulted in poor data capture for the July and August

exposure periods. As is also demonstrated below, the tubes exhibited poor precision

in the October exposure period, though overall precision was deemed ‘good’. Data

capture for the site was below 90% overall.

For the reasons described, the factor calculated by excluding periods with >20%

coefficient of variation (CV) has been presented herein.


LAQM USA 2015 48

Discussion of Choice of Factor to Use

The local adjustment factor, excluding periods with CV larger than 20%, has been

applied to all NO2 diffusion tube concentrations presented in this report.

The national bias adjustment factor was available, but contained only one study for

this preparation method, which was a low factor thus giving concentrations that were

not deemed to be representative of the local area.

Additionally, the local factor calculated using all data was not used for the reasons

described above. This factor was also much lower than the factor applied in previous

years.

The factor of 0.84 was therefore deemed most appropriate for application to the 2014

data.

PM Monitoring Adjustment

PM2.5 monitoring was conducted using a reference equivalent Partisol 2025. It was

therefore not necessary to adjust the data. Additionally, data capture was above

75%, so annualisation was not required.


LAQM USA 2015 49

Short-term to Long-term Data Adjustment

Data at sites which recorded less than 75% data capture during 2014 has been

annualised according to the method set out in LAQM TG(09) box 3.2. One site, B41,

required annualisation. The details of the annualisation have been provided in the

table below.

Site Annual Mean

Period Mean Ratio

Bournemouth AURN 13.4 11.5 1.164 Southampton Centre AURN 31.8 30.6 1.038

Honiton AURN 8.6 7.5 1.142 Average 1.115

QA/QC of Automatic Monitoring

QA/QC of automatic monitoring is carried out to AURN standard every six months by

R-AEA. The data ratification reports can be downloaded quarterly from:

http://ukair.defra.gov.uk/library/reports?section_id=13

QA/QC of Diffusion Tube Monitoring

South Yorkshire Air Quality Samplers participates in laboratory performance and

proficiency testing schemes. These provide strict performance criteria for

participating laboratories to meet, thereby ensuring NO2 concentrations reported are

of a high calibre. The lab follows the procedures set out in the Harmonisation

Practical Guidance. South Yorkshire Air Quality Samplers previously participated in

the Workplace Analysis Scheme for Proficiency (WASP) for NO2 diffusion tube

analysis and the Annual Field Inter-Comparison Exercise. In April 2014, a new

scheme, AIR PT9, was introduced. This is an independent analytical proficiency-

testing (PT) scheme, operated by LGC Standards and supported by the Health and

Safety Laboratory (HSL). AIR PT combines two long running PT schemes: LGC

Standards STACKS PT scheme and HSL WASP PT scheme.

Defra and the Devolved Administrations advise that diffusion tubes used for Local Air

Quality Management should be obtained from laboratories that have demonstrated

satisfactory performance in the AIR PT scheme. Laboratory performance in AIR PT is

also assessed, by the National Physical Laboratory (NPL), alongside laboratory data

from the monthly NPL Field Intercomparison Exercise carried out at Marylebone 9 http://laqm.defra.gov.uk/documents/LAQM-WASP-Rounds-121--124-and-AIR-PT-Rounds-1-3-4-6-(April-2013--February- 2015)-NO2-report.pdf


LAQM USA 2015 50

Road, central London. A laboratory is assessed and given a ‘z’ score. A score of 2 or

less indicates satisfactory laboratory performance.

South Yorkshire Air Quality Samplers performance for 2014 is covered by the last

round of the WASP scheme, WASP R124 and the first four rounds of AIR PT,

AR001-004. In each of these rounds, 100% of samples submitted by South Yorkshire

Air Quality Samplers had a Z score above 2, and were thus deemed satisfactory.


LAQM USA 2015 51

Appendix B: Monthly NO 2 Monitoring Data

Site Tube No. Month 2014

DC Unadjusted

Concentration Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

BK04 Christchurch Road 1 45.43 29.52 53.11 38.93 42.88 39.16 31.48 30.11 56.25 39.58 46.72 29.91 12 40.3

BK30 Yeomans Road 2 41.95 35.73 45.19 32.98 35.19 28.34 26.06 26.40 NR 41.21 40.70 34.47 11 35.3

BK32 Ilford Bridge Rb 3 21.43 35.56 45.70 42.07 41.55 34.78 29.67 33.31 49.62 40.18 45.20 34.98 12 37.8

BB11 Kings Park Drive 4 45.55 19.36 22.88 19.43 16.09 11.95 10.47 11.97 19.34 19.70 26.98 18.93 12 20.2 BK13 Wimborne Road

Kinson 5 49.73 37.00 40.20 37.95 31.90 27.89 27.94 27.52 36.42 41.18 48.18 43.90 12 37.5

BK14 Wallisdown Road 6 51.34 41.65 44.53 41.39 NR NR NR 41.86 49.62 47.27 38.47 47.73 9 44.9

BB15 AQM Trailer a 7 21.06 18.62 18.81 16.13 10.89 10.56 8.02 10.43 15.63 29.39 19.65 18.34 12 16.5

BB15 AQM Trailer b 8 17.03 NR 18.02 15.24 10.52 11.24 7.82 9.69 14.95 31.87 19.08 18.52 11 15.8

BB15 AQM Trailer c 9 20.77 17.63 19.80 14.59 12.92 9.33 8.81 9.45 16.67 48.10 23.59 16.56 12 18.2

BK16 Boundary Road 10 36.08 26.19 38.18 31.19 27.22 22.13 21.54 19.64 39.28 56.37 37.42 29.43 12 32.1

BK17 Castle Lane West 11 54.27 44.02 45.02 37.41 38.32 32.09 28.51 37.68 43.75 49.25 40.87 41.93 12 41.1

BK18 Castle Lane East 12 52.19 44.25 35.96 41.75 36.71 28.70 28.39 35.69 40.33 60.24 40.63 35.42 12 40.0

BK29 Castlepoint West 13 46.70 32.81 41.06 33.89 30.66 22.26 24.16 28.65 33.78 44.17 33.33 36.58 12 34.0

BK20 Wimborne Rd Winton a 14 56.48 60.21 49.65 35.18 50.15 27.09 34.19 41.87 43.93 17.20 52.12 34.26 12 41.9

BK20 Wimborne Rd Winton b 15 54.58 49.20 52.63 32.23 57.01 30.18 38.58 44.30 35.71 18.40 44.50 44.46 12 41.8

BK20 Wimborne Rd Winton c 16 56.85 51.51 60.44 33.26 52.30 31.71 38.56 39.41 52.04 15.34 51.67 41.46 12 43.7

BK23 Cambridge Rd. Rb 17 50.16 42.95 52.96 45.40 44.00 38.64 41.22 61.46 44.61 NR NR 37.47 10 45.9

BK24 Talbot Avenue 18 NR NR 34.68 33.37 36.44 28.53 27.86 33.34 32.86 37.67 34.40 45.63 10 34.5

BK25 Kinson Rd. Junction 19 55.10 39.54 38.77 42.44 43.80 31.28 37.59 34.72 49.88 45.70 49.60 44.66 12 42.8

BK26 St. Pauls Roundabout 20 58.17 49.65 51.76 48.25 48.00 35.24 33.16 42.62 51.08 48.75 52.02 44.66 12 46.9

BK31 Castlepoint East 21 54.04 42.08 46.56 44.71 46.20 34.14 37.06 42.98 43.64 51.12 48.82 48.53 12 45.0

BK28 Castlepoint 22 51.21 44.08 35.41 31.36 34.89 27.57 22.17 29.00 35.33 42.43 39.77 39.56 12 36.1

BK33 Alma Road 23 39.74 33.85 44.12 36.77 36.24 25.24 21.03 27.42 41.92 32.61 40.15 33.74 12 34.4

BK34 Bath Road 24 48.93 55.74 50.82 50.92 43.74 45.09 45.38 48.11 56.06 52.40 50.85 46.30 12 49.5


LAQM USA 2015 52

BK35 298 Wimborne Road 25 51.28 43.56 53.42 37.38 48.71 31.50 39.37 37.23 46.78 51.59 54.33 46.08 12 45.1

BK36 Wimborne Road Jct 26 51.43 NR 58.21 38.51 60.02 28.23 42.97 39.84 55.88 51.44 54.71 43.67 11 47.7

BK37 Cardigan Road 27 38.26 30.21 40.16 24.59 35.23 19.64 22.21 22.86 33.15 30.36 39.04 32.54 12 30.7

BK38 Kemp Road 28 39.00 32.52 36.83 21.83 28.65 23.56 18.97 20.34 30.72 33.43 38.43 25.86 12 29.2 BK39 Wimborne Road

Library 29 49.07 36.25 40.16 28.85 40.44 30.57 29.79 28.57 38.01 42.52 49.76 35.54 12 37.5

B40 14 Palmerston Road (Arcade) 30 47.26 37.10 40.54 45.23 44.13 30.52 31.83 34.86 47.19 38.07 61.79 35.44 12 41.2

B41 545 Christchurch Road 31 73.83 63.97 57.24 63.21 62.57 58.98 55.19 NR NR NR NR NR 7 62.1

B42 506 Christchurch road 32 53.49 45.51 56.74 47.20 49.68 44.98 40.36 43.93 52.27 49.51 57.93 52.65 12 49.5

B43 3 St Johns Rd (church) 33 40.52 37.76 34.81 33.32 27.95 24.38 26.23 36.76 36.28 38.75 32.27 31.83 12 33.4


LAQM USA 2015 53

Appendix C: Distance Correction The table below demonstrates the results of the distance corrections reported in

Section 2.2.1. Full tool runs are available on request.

Site X Y 2014

Background

(µµµµg/m3)

Distance

from

Receptor

(m)

Distance

from

Kerb

(m)

Distance of

Receptor

from Kerb (m)

2014

Concentration

(µµµµg/m3)

2014

Concentration

at Receptor

(µµµµg/m3)

BK34 409286 91190 18.0 12.4 1.5 13.9 41.6 30.1

BK36 408606 93374 16.7 3.9 0.1 4.1 40.1 28.2

B41 411262 91824 13.4 2 1 3 58.2 48.3

B42 411168 91792 13.4 2 1 3 41.6 35.4

bournemouth borough council updating and screening … · 2018-01-08 · bureau veritas bournemouth...

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